从括号内选择适当的词语完成句子。

1. I don't like doing the housework              (so/because) it's boring.

2. The most popular clothing store is Jason's. Because it has the            (best/worst)  quality clothing.

3. Bill dislikes dogs but he likes              ( other/else) small animals.

4. Mrs Green likes cooking because she thinks it's           ( boring/relaxing) .

5. This math problem is too difficult. I can't work it           ( on/out) .

患者，女，26岁。月经不调，经行血块甚多，色紫黑，且疼痛异常，舌红，脉弦数。

首选药物是（）。

A.花蕊石

B.白茅根

C.小蓟

D.大蓟

E.茜草